The Dwyer AQTIAP-WDPM-020 Air Quality Test Instruments Pro combine the versatile Model UHH2 handheld base with the WDPM wireless Differential Pressure Module. The versatile combination of the AQTIAPWDPM020 provides a line of instruments capable of streamlining a technician’s everyday testing by combining all into one product and using Bluetooth SIG, Inc. wireless technology for ease of use. The AQTIAP-WDPM-020 Differential Pressure Module can read pressure limits of ± 20 in w.c. (± 5 kPa). The AQTIAP-WDPM-020 also comes with the UHH-BTG mobile wireless gateway, which will convert the wireless signal from any Dwyer universal handheld probe or module into a Bluetooth SIG, Inc, Wireless Technology. It also includes a hard plastic case with pre-cut foam inserts for additional sensors.